现在完成时精品ppt课件 小升初.ppt
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1、Present Perfect Tense,小升初考点-现在完成时,Present Perfect Tense 现在完成时,主语+have/has+过去分词(pp),现在完成时的结构,Winter has already come,,will it still be far in spring?,主语+have/has+过去分词(pp),否定形式 havent(have not)+过去分词 hasnt(has not)+过去分词,疑问句 把助动词 have/has 放在句首,现在完成时的结构,注:主语若是第三人称单数助动词用 has,You have planted all the trees
2、.I have planted all the trees.He/she has planted all the trees.They have planted all the trees.,区别have 和 has的用法,主语若是第三人称单数助动词用 has,1、规则变化(过去分词与过去时变化规则一样),(1)、一般动词,在词尾直接加“ed”。work-worked-worked visit-visited-visited(2)、以“e”结尾的动词,只在词尾加“d”。live-lived,过去分词,(3)、以“辅音字母+y”结尾的动词,将“y”变为“i”,再加“ed”。,study-stud
3、ied-studied cry-cried-cried(4)、重读闭音节结尾,末尾只有一个辅音字母,先双写该辅音字母,再加“ed”。stop-stopped-stopped drop-dropped-dropped,2、不规则变化,havehadhad am/is wasbeenarewerebeen dodiddone gowentgone seesawseen,Present perfect tense 现在完成时,构成:用法一:,表示过去发生的某一动作对现在造成的影响或结果.现在完成时,强调是过去动作与现在的联系,也就是强调现在的影响和结果.,have/has+过去分词,1.两个句子都表
4、示过去发生的事;2.现在完成时强调过去和现在的联系,不能和具体的时间状语连用;3.一般过去时强调过去发生的事或状态,没有说明与现在的关系,它与表示过去的具体时间连用。(last,ago,yesterday,etc.),present,past,I have lived here for two years,I lived there 2 years ago,现在完成时和一般过去时的区别:,现在完成时:强调这一动作产生的结果对现在的影响或结果,与现在有关。一般过去时:仅表示在过去某一时刻曾发生过这一动作,与现在无关。,他已学英语五年了。,He has studied English for fi
5、ve years.,他曾学过五年英语。,He studied English for five years.,(说明他还会继续学下去),(只说明他过去学过五年英语,但现在不学了。),Ive lived here for ten years.我在这里住了10年。(现在仍住这儿)I lived here for ten years.我在这里住过10年。(现在不住这儿了)He has bought a house.他买了一栋房子。(现在已拥有这房子)He bought a house ten years ago.他10年前买了一栋房子。(现在是否仍拥有这房子不清楚),一般过去时与现在完成时有一些明显
6、的时间状语。,遇到yesterday,Last year,in May,in+过去某一年,two days ago,the other day,just now等就用一般过去时(表过去的时间),当有 so far,in/during/over the past/last few days(在过去/最近的几年里),since接过去时间状语或过去时的句子等常用现在完成时(不能与确定的时间),Put the following sentences into English.A:火车已经开走了.B:什么时候开走的?A:半个小时之前开走的.A:这本书我已经买了两年了.B:你在哪儿买的?A:在我老家买的.
7、A:你看过这部电影吗?B:看过.A:什么时候看的.B:上周星期天看的.,A:The train has left.,B:When did it leave.,A:It left half an hour ago.,A:have you seen the film?B:Yes,I have.A:When did you see it?B:I saw it last Sunday.,A:Ive had the book for two years.B:Where did you buy it?A:I bought it in my hometown.,现在完成时不能与表示过去的时间状语连用,常与之
8、连用的时间状语有:,before,by now(so far),once,twice,just,recently yet(否/疑),already(肯),ever,never,all ones life,in/during/over the past/last 5 years,(1)already,肯定句:“己经”,一般疑问句:句末(表示惊讶的语气)“难道”,Have you had breakfast already?(表示强调),Ive already had breakfast.(常见)=Ive had breakfast already.,注:有already的句子在时态上并不都是现在
9、完成时,判断时要看该词后是否有动词的过去分词.Eg.Shes already eighty years old.It was already very late.,(2)yet,否定句:句末“还(没)”,疑问句:句末“己经”,Have you had breakfast yet?,I havent had breakfast yet.,注意:当在肯定句中含already或just,变否定时,在句末加yet。,I havent seen the film yet.,Mother has just cleaned the house.,Mother hasnt cleaned the house
10、yet.,I have already seen the film.,(3)ever,肯定句/疑问句:句中“曾经”,Ive ever been to Beijing.Have you ever been to Beijing?,(4)never,否定句:句中“从来没有”Ive never been to Beijing.,注:带ever的肯定句变否定句时,将ever变never,He has ever made meal.,Have they ever travelled by train?No,never.,He has never made meal.,带ever的一般疑问句作否定回答时可
11、用“No,never.”,(5)just,用于句中,表示“刚刚”Ive just had breakfast.What have they just done?,(6)before,用于句末,表示“以前”Ive seen it before.Has she ridden a bike before?,Exercises,1.I _(have)lunch already.2.Has the train_(arrive),yet?3.Tome _ never_(be to)China.4.The twin _just _(see)my father.5.The twins _(see)my fat
12、her just now.6.Many tall buildings _(build)in the past 5 years.,have had,arrived,has,been to,has,seen,saw,have been built,用法二:E.g.Kate has lived here for 3 years.Kate has lived here since 3 years ago.Kate has lived here since she came to China.,表示过去所发生的动作或存在的状态,一直持续到现在并可能还将持续下去。动词使用延续性动词。常与for或since
13、引导的时间连用,since:(自以来)1)since+时间点Hehasstayedheresince5oclock.2)since+时间段+agoHehasstayedheresince5hoursago.3)since+从句(句中的谓语动词为过去式)ShehastaughtEnglishsincehecamehere.for:(长达)for+时间段He has kept the book for 2 weeks.,since,for 的用法:,注意:对for或since引导的时间状语提问 必须用_,1.I have lived here for 10 years.,How long have
14、 you lived here?,2.She has stood here since 2 hours ago.,How long has she stood here?,how long,选用for和since填空:1.We havent seen each other _ a long time.2.His father has been in the Party _ 10 years ago.3.The film has been on _ 20 minutes.4.Mr Green has worked here _ he came to China.5.His grandpa has
15、 been dead _ several years.,for,since,for,since,for,6.Mr.Brown has had his TV _ 15 years.7.Ive taken driving lessons _last month.8.My sister has had her cell phone _a month.9.My friends havent visited me _my birthday.10.We havent used our car _ a long time.11.She hasnt had a good cup of coffee _year
16、s.12.Tom has worn glasses _he was 7 years old.,for,since,for,since,for,for,since,注意:瞬间动词不能和时间段连用.,注意,重点句型:It is/has been+段时间+since从句 段时间+has passed+since从句,eg.他死了两年了:He died two years ago.He has been dead for two years/since two years ago It is/has been two years since he died.Two years has passed s
17、ince he died.,这本书我借了一个月了。,I borrowed this book a month ago.,It is/has been a month since I borrowed the book.,I have kept the book for a month./since a month ago.,A month has passed since I borrowed the book.,用法三:have been to 曾经去过某地(已返回)have gone to 去了某地(还没有回来),A,B,A,B,巧记:been to,gone to 意不同,两者用法要记清
18、;have been to+地名,曾经到过某地行;have gone to+地点,到某地去了已走远。have been in+地点,在某地呆多久。,can you distinguish?,has gone to,have gone to,have been to,been to,been in,has been,have,has been,Have,用have/has been to,have/has gone to填空:1.Where is your brother?He _ the shop.Hell be back soon.2._ you ever _ to America?Yes,
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